The recommendations in this section are using the RoI fertiliser classification system and are based on Teagasc research. Due to slight differences between the RoI and NI classification systems, these recommendations are only a guide for Northern Ireland farmers. They can be converted between the RoI and NI classification systems using this CONVERSION TABLE
Table 32. Nutrient Requirements (units/acre)
Index1
N2
P3
K3
1 Very Low
160
56
256+80Mg
2 Low
130
44
192
3 Medium
94
32
128
4 High
57
16
64
(1)
- These recommendations are for sandy loams with approximately 160 mm of rainfall after falling between April-June. If the soil is a loam, decrease Nitrogen (N) rates by 30 units.
(2)
It is advised to apply up to 100 units N/acre into the seedbed.
(3)
All Phosphorus (P) and Potassium (K) requirements should be incorporated into the seedbed.
These recommendations are for sandy loams with approximately 160
mm of rainfall after falling between April-June. If the soil is a loam, decrease N rates
by 30 units.
Top Dressing
Sweetgrass: 23% Nitrogen (N) + 2% Sulphur (S) +
1.2% Magnesium (Mg) + 5% Sodium (Na). This should be used for top dressing the beet as an alternative to ordinary Nitrogen. The two-fold benefit of the combination of Nitrogen along with the Sulphur, Magnesium and Sodium make it a perfect option for beet.
